kWh per 100 Miles Calculator

The kWh per 100 Miles Calculator converts your electric vehicle's energy consumption into the standardized efficiency metric used on EPA window stickers — making it easy to compare EVs on equal footing. Enter your miles per kWh, distance travelled, energy used, and electricity price per kWh to get your kWh per 100 miles rating. Secondary outputs include your actual efficiency, cost per 100 miles, and projected annual energy cost based on 12,000 miles per year.

mi/kWh

Your vehicle's energy efficiency rating

Distance for calculation reference

kWh

Actual energy consumed for the distance

Your local electricity rate

Results

kWh per 100 Miles

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Actual Efficiency (mi/kWh)

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Cost per 100 Miles

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Annual Energy Cost (12k miles/year)

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Frequently Asked Questions

What is kWh per 100 miles?

kWh per 100 miles measures how much electrical energy an electric vehicle consumes to travel 100 miles. It's the inverse of miles per kWh and helps compare energy efficiency between different EVs.

How do I convert miles per kWh to kWh per 100 miles?

Use the formula: kWh per 100 miles = 100 ÷ miles per kWh. For example, if your EV gets 4 mi/kWh, then it consumes 25 kWh per 100 miles (100 ÷ 4 = 25).

What is a good kWh per 100 miles rating for an electric vehicle?

Most efficient EVs consume between 20-30 kWh per 100 miles. Smaller, lighter vehicles typically achieve 20-25 kWh/100mi, while larger SUVs may use 30-40 kWh/100mi or more.

How does kWh per 100 miles compare to MPG?

kWh per 100 miles is the electric equivalent of gallons per 100 miles for gas cars. Lower kWh/100mi numbers indicate better efficiency, similar to how higher MPG indicates better fuel economy.

What factors affect my EV's kWh per 100 miles?

Key factors include driving speed, weather conditions, use of heating/AC, terrain, tire pressure, vehicle weight, and driving style. Highway driving and cold weather typically increase energy consumption.

How can I improve my EV's energy efficiency?

Drive smoothly with gradual acceleration and braking, maintain proper tire pressure, pre-condition your vehicle while plugged in, use eco-mode when available, and minimize use of heating/cooling when possible.

Why is miles per kWh important for EV owners?

Miles per kWh helps you estimate driving range, calculate energy costs, compare vehicle efficiency, and plan charging stops for long trips. It's essential for understanding your EV's operating costs and performance.